Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 341 | Osmond | Teutonic | God's protection. | M | |
| 342 | Osmont | English | Divine protector. | M | |
| 343 | Osmund | English | Variant of Osmond: Divine protector. | M | |
| 344 | Osmund | Scandinavian | Godly protection. | M | |
| 345 | Osmund | Teutonic | God's protection. | M | |
| 346 | Ospak | Norse | Brother of Gudrun. | M | |
| 347 | Osraed | English | Divine counselor. | M | |
| 348 | Osred | English | Divine counselor. | M | |
| 349 | Osric | Anglo-Saxon | Divine ruler. | M | |
| 350 | Osric | English | Divine ruler. | M | |
| 351 | Osric | Teutonic | Divine ruler. | M | |
| 352 | Osrick | English | Divine ruler. | M | |
| 353 | Osrid | English | Divine counselor. | M | |
| 354 | Osrik | English | Divine ruler. | M | |
| 355 | Osrik | Teutonic | Divine ruler. | M | |
| 356 | Osryd | English | Divine counselor. | M | |
| 357 | Ossama | Muslim | One of the names of the lion.. | M | |
| 358 | Ossian | Irish | Fawn. | M | |
| 359 | Ossie | English | Diminutive of Oscar: Divine spear; God's spear. Famous Bearer: poet Oscar Wilde (1854-1900), who was put on trial and imprisoned for homosexuality. | M | |
| 360 | Ossy | English | Diminutive of Oscar: Divine spear; God's spear. Famous Bearer: poet Oscar Wilde (1854-1900), who was put on trial and imprisoned for homosexuality. | M | |